Other

Toyo Kohan Co., Ltd.

Sony Corporation

Tsutomu Seki

Shunji Yoshimura

Manabu Oku

Kouichi Kawatani

Kinji Saijo

Kazuo Yoshida

Masaru Miyamoto

Shinji Ohsawa

Hiroaki Okamoto

Daisuke Negi

A method for manufacturing a gas separating unit which comprises laminating a metal plate on a material capable of separating a hydrogen gas (palladium alloy foil) by cladding, etching selectively a central portion of a cut clad plate (K) using an etching solution, to thereby expose an underlying palladium alloy foil layer, and providing a metal supporting plate on the other side of the palladium alloy foil layer. The method allows the manufacture of a gas separating unit having an enhanced effective area of a material capable of separating a hydrogen gas and is excellent in the handlability of a material capable of separating a hydrogen gas during manufacturing.

Gas separating unit and method for manufacturing the same

A ferritic stainless steel sheet containing 16-25 mass % of Cr and Ti and/or Nb at a ratio of (C&plus;N)&times;8 or more is used as a substrate for formation of a hydrogen-permeating membrane exposed to a high-temperature atmosphere of 600-900&deg; C., while another ferritic stainless steel sheet containing Cr up to 15 mass % is used as a substrate for formation of a hydrogen-permeating membrane exposed to a high-temperature atmosphere of 450-600&deg; C. The stainless steel sheet is formed to a perforated body 3 with holes for passage of gas. A hydrogen-permeating membrane 3 is fixed to on an external surface of the perforated body 3 to build up a hydrogen-separating pipe 3. A plurality of the hydrogen-separators 3 are inserted into a cavity between inner and outer walls of a double-pipe 2 filled with a catalyst 4. Hydrocarbon gas fed through a nozzle 7 is decomposed with combustion heat of a fuel F fed into an inner space of the double-pipe 2. A decomposition product H selectively permeates through the membrane 3 and flows out through the takeout opening 8.

Gas reformer for recovery of hydrogen

The new hydrogen-recovering device has a box-shaped frame made of stainless steel having a takeout pipe attached to its one side. A plurality of spacers are arranged inside the box-shaped frame along a lengthwise direction of the device . A perforated metal plate is fixed to each surface of the box-shaped frame , and a hydrogen-permeating membrane cladded with a membrane holder is further fixed to the perforated metal plate . Hydrogen gas as a decomposition product of hydrocarbon selectively passes through the hydrogen-permeating membrane and flows through the takeout pipe to the outside. A tubular device, which has the structure that a hydrogen-permeable membrane is fixed to a perforated metal plate wound around a tubular frame, is also proposed. The device is light and strong, so that it is installed in a gas-reforming plant without use of a fixing jig.

Device for recovery of hydrogen

Growing community of inventors

Tokyo, Japan

Tsutomu Seki